test: move runas() to the shared utility library

test/units/testsuite-07.main-PID-change.sh

@@ -5,6 +5,9 @@ set -o pipefail
 
 # Test changing the main PID
 
+# shellcheck source=test/units/util.sh
+. "$(dirname "$0")"/util.sh
+
 systemd-analyze log-level debug
 
 # The main service PID should be the parent bash process
@@ -166,12 +169,6 @@ test "$(systemctl show -P Result test-true.scope)" = success
 
 # Test that user scope units work as well
 
-runas() {
-    declare userid=$1
-    shift
-    XDG_RUNTIME_DIR=/run/user/"$(id -u "$userid")" setpriv --reuid="$userid" --init-groups "$@"
-}
-
 systemctl start user@4711.service
 runas testuser systemd-run --scope --user --unit test-true.scope /bin/true
 test "$(systemctl show -P Result test-true.scope)" = success

test/units/testsuite-43.sh

@@ -3,13 +3,10 @@
 set -eux
 set -o pipefail
 
-systemd-analyze log-level debug
+# shellcheck source=test/units/util.sh
+. "$(dirname "$0")"/util.sh
 
-runas() {
-    declare userid=$1
-    shift
-    XDG_RUNTIME_DIR=/run/user/"$(id -u "$userid")" setpriv --reuid="$userid" --init-groups "$@"
-}
+systemd-analyze log-level debug
 
 runas testuser systemd-run --wait --user --unit=test-private-users \
     -p PrivateUsers=yes -P echo hello

test/units/testsuite-58.sh

@@ -3,11 +3,8 @@
 set -eux
 set -o pipefail
 
-runas() {
-    declare userid=$1
-    shift
-    XDG_RUNTIME_DIR=/run/user/"$(id -u "$userid")" setpriv --reuid="$userid" --init-groups "$@"
-}
+# shellcheck source=test/units/util.sh
+. "$(dirname "$0")"/util.sh
 
 if ! command -v systemd-repart &>/dev/null; then
     echo "no systemd-repart" >/skipped

test/units/util.sh

@@ -74,3 +74,9 @@ get_cgroup_hierarchy() {
             exit 1
     esac
 }
+
+runas() {
+    local userid="${1:?}"
+    shift
+    XDG_RUNTIME_DIR=/run/user/"$(id -u "$userid")" setpriv --reuid="$userid" --init-groups "$@"
+}